So, i just goggled and the switch has 4GB RAM.
That is a huge bottleneck there for any and all open world games designed to run with 8GB.
Both of wich are actually less than those numbers due to the operative system.
Now, i don't know if FF7 will be open world or not. But, it will very unlikely even if it isnt.
Bethesda did a decent job with Doom, but don't take that as proof that anything on the PS4/X1 can run on the switch. Even if you cut the FPS in half.







